IT1223602B - Circuito di controllo in corrente continua - Google Patents

Circuito di controllo in corrente continua

Info

Publication number
IT1223602B
IT1223602B IT23214/87A IT2321487A IT1223602B IT 1223602 B IT1223602 B IT 1223602B IT 23214/87 A IT23214/87 A IT 23214/87A IT 2321487 A IT2321487 A IT 2321487A IT 1223602 B IT1223602 B IT 1223602B
Authority
IT
Italy
Prior art keywords
control circuit
direct current
current control
direct
circuit
Prior art date
Application number
IT23214/87A
Other languages
English (en)
Other versions
IT8723214A0 (it
Inventor
Pierre J Schingh
Original Assignee
Mitel Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitel Corp filed Critical Mitel Corp
Publication of IT8723214A0 publication Critical patent/IT8723214A0/it
Application granted granted Critical
Publication of IT1223602B publication Critical patent/IT1223602B/it

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/001—Current supply source at the exchanger providing current to substations
    • H04M19/005—Feeding arrangements without the use of line transformers

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Interface Circuits In Exchanges (AREA)
IT23214/87A 1986-12-24 1987-12-24 Circuito di controllo in corrente continua IT1223602B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA000526334A CA1255026A (en) 1986-12-24 1986-12-24 Dc control circuit

Publications (2)

Publication Number Publication Date
IT8723214A0 IT8723214A0 (it) 1987-12-24
IT1223602B true IT1223602B (it) 1990-09-29

Family

ID=4134645

Family Applications (1)

Application Number Title Priority Date Filing Date
IT23214/87A IT1223602B (it) 1986-12-24 1987-12-24 Circuito di controllo in corrente continua

Country Status (6)

Country Link
US (1) US4803721A (it)
JP (1) JPH0636539B2 (it)
CA (1) CA1255026A (it)
DE (1) DE3744104C2 (it)
GB (1) GB2199719B (it)
IT (1) IT1223602B (it)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5148475A (en) * 1990-04-06 1992-09-15 Harris Corporation Reduced contact resistance on a SLIC
EP0455893B1 (en) * 1990-05-11 1995-02-01 Alcatel N.V. Telecommunication line circuit
US5337354A (en) * 1992-07-30 1994-08-09 Hubbell Incorporated Tip-ring voltage correction circuit
WO1994003990A1 (en) * 1992-08-07 1994-02-17 Pascom Technologies Pty. Ltd. Isolation interface apparatus
US5329585A (en) * 1992-11-30 1994-07-12 Motorola, Inc. Subscriber line interface circuit for controlling AC and DC output impedance
EP0622943B1 (en) * 1993-04-30 2001-09-12 STMicroelectronics S.r.l. Power management circuit for a subscriber line interface circuit
GB2280333B (en) * 1993-07-16 1997-08-06 British Telecomm Noise reduction
SE502493C2 (sv) * 1994-09-20 1995-10-30 Ericsson Telefon Ab L M Förfarande och anordning för att bestämma longitudinella signalkomponenters avvikelse från ett förutbestämt värde
US5854550A (en) * 1997-11-06 1998-12-29 Lucent Technologies Inc. Transformerless digital-line battery feed circuit
US6567521B1 (en) * 1999-08-17 2003-05-20 Silicon Laboratories, Inc. Subscriber loop interface circuitry having bifurcated common mode control
US6819761B1 (en) * 1999-09-16 2004-11-16 Silicon Laboratories, Inc. Programmable constant current “off hook” circuit
SE9904641L (sv) * 1999-12-17 2001-06-18 Ericsson Telefon Ab L M Abonnentlinjekrets
JP4968583B2 (ja) * 2007-03-02 2012-07-04 寿明 樋口 糞取具
US9860392B2 (en) 2015-06-05 2018-01-02 Silicon Laboratories Inc. Direct-current to alternating-current power conversion

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1130940A (en) * 1978-09-22 1982-08-31 Oki Electric Industry Co., Ltd. Current supply circuit for telephone exchange
US4387273A (en) * 1980-08-25 1983-06-07 International Telephone And Telegraph Corporation Subscriber line interface circuit with impedance synthesizer
CA1157175A (en) * 1981-02-20 1983-11-15 Mitel Corporation Power saving line circuit
DE3138649A1 (de) * 1981-09-29 1983-04-14 TE KA DE Felten & Guilleaume Fernmeldeanlagen GmbH, 8500 Nürnberg Verfahren und schaltungsanordnung zur speisung einer teilnehmerendeinrichtung
CA1179078A (en) * 1982-06-04 1984-12-04 Stanley D. Rosenbaum Active impedance line feed circuit
US4563547A (en) * 1983-03-07 1986-01-07 At&T Bell Laboratories Loop-start/ground-start line interface circuit
CA1200938A (en) * 1983-09-30 1986-02-18 Mitel Corporation Voice and data interface circuit
CA1231480A (en) * 1985-03-15 1988-01-12 John A. Barsellotti Constant current line circuit

Also Published As

Publication number Publication date
GB2199719A (en) 1988-07-13
DE3744104C2 (de) 1993-11-11
IT8723214A0 (it) 1987-12-24
JPS63169864A (ja) 1988-07-13
JPH0636539B2 (ja) 1994-05-11
CA1255026A (en) 1989-05-30
US4803721A (en) 1989-02-07
GB8728466D0 (en) 1988-01-13
DE3744104A1 (de) 1988-07-07
GB2199719B (en) 1990-01-31

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Legal Events

Date Code Title Description
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19961230